Press



Oct. 18, 1938. R, w. GLASNER ET AL 2,133,444

n PRESS Filed Sept. 16, 1937 6 Sheets-Sheet 2 '30 IrIIHHl, ||III Oct. 18, 1938. R. w. GLASN'ER ET Al. t 2,133,444

PRESS Filed sept, 16, 1957 6 sheets-sheet 3 s 5 s i i l" R. w. GLASNER E'r AL. 2,133,444

PRESS oct. 18, 1938.

6 Sheets-Sheet 4 Filed-Sept. 16, 1937 Oct. 18, 1938. v R. w. GLAsNER E-r AL 2,133,444'

PRESS Filed sept. 1e, 1957 6 sheets-sheet 5 Oct. 18, 1938.

4 R. w. GLAsNER ET Al.u

PRESS Filed Sept. 16, 1937 6 Sheets-Sheet 6 v COMPLET: cYcL'e afa/M55 /N a/vf cYcLE All!! DwcLlL Patentes on. 1s, 193s UNITED STATES' 2,133,444 PATENT OFFICE 2,133,444 mss Rudolph W. Glasner and Einar K. Johansen, Chicago, Ill.; laid Johansen assigner to said Gleaner Application September 18, 1937, Serial No. 164,176

necessary in order to perform the drawing, or thev shaping oi the work, to p'rovide a degree orperiod of dwell in the blank holding slide while itis holding or gripping the work, and while another slide is imparting its operating stroke.

Heretofore the operating means for the blank holder has either been iroma crank motion, or mechanism describing a circular path oi' movement, and in order to obtain a long dwell it has been necessary to employ a large number or series of links, the pivots of which pass through dead centers, as well as other complicated and expensive mechanism.

Even with such prior structures the amount of dwell obtained has been of comparatively short duration with respect to the 360 of rotation of the actuating shafts or gears.

It is one of the objects of the present invention to provide improved means whereby a degree of dwell of the blank or work holding slide as high as`150 or even more of a dwell can be obtained .in one complete cycle of rotation of the main driving gear or shaft, and at the same time simplify the construction and reduce the amount of linkage necessary, by selecting the driving or operating point for the blank holder movement, and locating such driving or connection point of the links with an eccentric actuating strap, and which point of connection will be laterally offset with respect to the center of the eccentric, causing, when the eccentric is rotated, the center of the pin or connection to travel in an elliptical path of movement, thereby obtaining a long dwell without the use of the conventional link motion.

During such movement of the said point of connection, the period of dwell of the blank or Work holder will occur on the at or long side of the ellipse.

With this simple construction of providing an offset pin on' the eccentric strap, all that is neces- Figure 1 is a view partly in elevation, partly in section and partly broken away of a press of this character constructed in accordance with the principles of this invention.

Figure 2 is a tcp plan view of Figure 1.

Figure 3 is a detail vertical sectional view taken I on line 3-3, Figure2.

Figure 4 is a view partly in elevation. partly in section and partly broken away of the mechaniszn for actuating the inner slide.

' Figure 5 is a view similar to Figure 4 showing a portion oi' the mechanism for actuating the. outer slide.

Figure 6 is a detail view partly in elevation, partly broken away and partly in section, showing a portion of the mechanism whereby the extended period of dwell of the inner slide is ob' tained, on an enlarged scale.

Figure 7 is a detail perspective view oi the mechanism shown in Figure 6.

Figure 8 is a view partly in elevation, partly in section and partly broken away, showing the bed of a press, the lower slide and the mechanism for actuating the lower slide.

Figure 9 is an irregular vertical sectional view taken online 9 9, Figure 8.

Figure 10 is a cyclograph of the movement of the slides showing the extended or long period of dwell obtained in the slides.

Figure 11 isanother cyclograph of the movement of the upper slides obtainable with this mechanism. f

Referring more particularly to the drawings, the press consists essentially of a bed I 5, uprights I6, a hollow crown I1, secured together in any suitable manner, an outer slide I8 slidable upon guides I9 carried by the uprights, and an inner slide 20 nested with the'outer slide I8 and movable in guides 2l on the outer slide, all as well known in this art.

` The outer slide I8, constituting a blank or work holder, is supported by upright members 22 adjustably connected at one end yto the slide, in any suitable manner and moving through suitable. bearings 23, supported by the bottom of the crown Il, and which bearings are of such a length that the outer slide will be relieved of all lateral stresses exerted upon the members 22 by the actuating mechanism.

Loosely supported upon shafts 24, which shafts are laterally spaced, parallel with each other, and journaled in suitable bearings, are rocking members 25, one member being provided for each of the supporting lmembers 22, and the members 25 are connected with the respective members 22 through the medium of links'26 pivotally connected at one end as at 21 with the members 25, and pivotally connected at their other end `as at 28 with the members 22, so that when the members '25 are rocked about the shafts 2l, in a manner to be described, a reciprocatory movement will be imparted to the outer slide I9.

In orderto obtain a period of dwell in the outer slide, suitable mechanism intermediate the members and the actuating eccentric is provided, and as the actuating mechanism which is connected to each of the members 22 is the same, the description of one will apply equally as well to them all. Secured to the shaft 24 for rotation therewith is an eccentric 29, and an eccentric strap encompasses the eccentric and the eccentric strap is provided with a projecting portion 3| which is offset laterally with respect to the center of the eccentric. A supporting shaft 32 arranged parallel with the shaft 24`carries a sleeve 33 mounted to oscillate about such shaft, and connected to the sleeve is an arm 34 which in turn is connected by means of a link 35 with the rocking member 25, the link 35 being pivotally connected as at 36 with the arm 34 and as at 31 with the member 25.

The sleeve 33 is provided with arms36 (see particularly Figure 2) which are connected with the eccentric strap 30 through the medium of a link 39 one end of which is pivotally connected as at 40 to the arms 38 and the other end is pivotally connected as at 4| with the extension 3| of the eccentric strap 30.

With this construction, when the eccentric 29 is rotated in the direction indicated by the arrow in Figure 6 the eccentric strap, and particularly the portion 3| thereof, will be given a movement that the point of pivotal connection 4| .between the link 39 and the portion 3| of the eccentric strap will be given an elliptical path of movement as indicated by the line 42 in Figure 6. This will rock the sleeve 33 and through the medium of the intermediate connecting members between the sleeve 33 and the member 22 will, move the outer slide downwardly into engagement with the work and thence upwardly. The movement of the slide toward and into engagement with the work will occur while the pivot point 4| is traveling through the smaller arcs of the ellipse; and, after the slide has moved into engagement with the work lto clamp the same, the pivot point 4| will be traveling along the long side of the ellipse, thereby producing a prolonged or extended dwell of the slide for approximately 150 of the 360 of rotation of the driving shaft 24 or eccentric 29.

The end 43 of the eccentric strap 30 is connected to an arm 44 by means of a pivot 45 and this arm 44 is connected to a sleeve 46 (see particularly Figure 3) that is in turn mounted upon a bearing or extension 41 of one of the eccentrics 29, and depending from the sleeve 46 is an arm 48 to vwhich latter is pivotally connected by means of a pivot 49, a link 50. 'I'his link in turn is connected to upright members 5| (see also Figure 4) which latter are in turn adjustably connected to the inner slide 22 (see also Figure 1). The members 5| slide in extended bearings 52 which are Supported by the crown |1. 'I'he bearings 52 are of such a length that the members 5| will remain upright so that any lateral stress exerted upon the members 5| by the actuating mechanism for the inner slide, will not be manifested upon the inner slide 20.

'I'hus it will be seen that upon operation of the eccentric 29, the outer slide will be operated through the medium of the connection of the links between the slide and the eccentric strap at one end of the eccentric strap, and the inner slide will be operated by the link mechanism shown) which is connected to the free end or extremity 43 of the eccentric strap.

With this construction four eccentrics will be provided and the connections between the links and the portion 3| of th'e eccentric strap, by the pivot 4| will operate the outer slide, one being provided adjacent each corner of the slide, while the free ends of the eccentric strap through the medium of the link connection will operate the inner slide. Each eccentric strap will be connected at one point to the outer slide and at another point to the inn'er slide but the points of connection between the outer and inner slides will be on opposite sidesof the press.

'I'he shafts 24 have secured thereto operating gears 53 (see particularly Figures 1 and 2) which mesh with each other and meshing with one of the gears is a pinion 54 which is mounted upon a shaft 55 and on the shaft 55 is another gear 56. This gear 56 is in turn rotated by means of a pinion 51 meshing therewith. The pinion 51 is driven from a motor 58. Intermediate the pinion 51 and the motor 58 is a clutch device of any desired or suitable construction which is adapted to be rendered active and inactive to cause the shafts 24 tobe rotated or to arrest their movement. This is accomplished by actuating the clutch device 59 in any suitable manner, either manually, electrically, hydraulically or by fluid pressure (not Suilice it to say that when the clutch islrendered active the shafts 24 will be rotated but when the clutch is rendered inactive the shafts 24 will remain idle. Any suitable connection between the pinion 51 and the motor may be provided, such for instance as a belt drive 60 passing over a pulley 6| on the motor shaft and a pulley 62 which forms a part of the clutch device.

A lower slide 63 operates in the bed I5 and this slide may be actuated in any desiredor suitable manner such as by means of eccentrics 64 with which eccentric straps 65 co-operate. These eccentric straps are pivotally connected to uprights 66, any number of which may be provided. The uprights in turn are adjustably connected with the slide 63, as at 61, and the uprights slide in extended bearings 68 so that any lateral stresses exertedupon the uprights 66. by the actuating mechanism will not be manifested upon the slide 63.

One of these uprights and eccentric driving. mechanisms is preferably provided in each corner of and below the bed..

Each eccentric 64, is secured to a shaft 69 and the shaft is rotated by means of a gear 16 with which a pinion gear 1| meshes. This pinion gear is in turn connected with a. gear 12 and the adjacent gears 12 mesh with each other. A pinion gear 13 meshes with one of the gears 12 and this pinion gear is connected to a shaft 14, the shaft in turn being connected to a clutch member 15, (see particularly Figures 8 and 9). Loosely mounted upon the shaft 14 is another clutch member 16 with which the clutch member 15 cooperates. Passing over the clutch member 16 is an endless drive belt 11 which passes over a pulley 18 on the shaft 19 of a motor 80, the motor 80 being supported by a suitable bracket 6|.

The clutch member 16 is continuously rotated by the motor and is mounted to freely rotate upon the shaft 14 and when the clutch 15 is inactive with respect to the clutch member 16, the shaft 14 will remain idle. When, however, the clutch members 15 and 16 are rendered active with respect to each other, the shaft 14' will be rotated and this in turn will rotate eccentrics 64 to reciprocate the slide 63. Y

The upper slides I8 and 20 and the lower slide 63 may be operated in timed relation with each other or in any predetermined order or sequence, the operation of the slides being controlled by the respective clutch devices.

By reason of the link connection between the eccentric straps 30 and the outer slides, and by reason of the pivot 4| traveling in the elliptical path indicated by the line 42, there is procured a period of dwell in the operation of the outer slide for a greater extent, or approximately 150 with respect to the complete cycle of operation of the driving shafts, to-wit, the shafts 24, or the eccentrics 29, than has been possible with the construction heretofore provided. The period of dwell in the operation of the outer slide is diagrammatically represented in the cyclographs.

The degree of dwell of the inner slide is also indicated in cyclographs.

When it is desired to increase the period of dwell in the operation of b oth the inner and the outer slides, the clutch device controlling these two slides is rendered inactive at a predetermined time of the operation of the press, that is, when the slides reach the limit of their lowermost movement; that is, when the dies carried by these slides are operating upon the work, the 'clutch device which controls these slides is rendered inactive. In other words, the actuating mechanism for the slides i8 and 20 is disconnected from the motor so that these two slides will remain at rest lwhile the lower slide is operating.

When it is desired to control the movement of the lower slide the clutch device which controls this slide is rendered active or inactive according to the work which the lower slide is to perform or whether it is desired to maintain the lower slide inactive.

'Ihe dwell is obtained in the outer or blank holding slide through the medium of the link connection with the eccentric strap, while the dwell of the inner slide is obtained by disengaging the clutch device and arresting the movement of the shafts 24 and eccentrics 29.

With this improved construction it will be manifest that the period of dwell of the slides is materially increased from the period of dwells which can be obtained with prior constructions,

and at the same time a considerably less eX- pensive structure is produced and the number of links has been reduced and the complicated mechanism heretofore necessary to accomplish these results has been very much simplified.

By the manipulation of the clutch devices with respect to their individual actuating mechanisms, this press may be caused to operate either as a triple or a double action press.

While the preferred form of the invention has been herein described, it is to be understood that various changes may be made in the details of construction and in the combination and arrangement of the several parts, within the scope of the claims, without departing from the spirit of this invention.

What is claimed as new is:-

1. In a press, a plurality of slides, a plurality of eccentrics, eccentric straps individual to the eccentrics, two sets of rocker members, said' eccentricstraps directly connected to one set of said rocker members, means forming connections between one of said sets of rocker members and one of said slides, means forming connections between the other set of rocker members and another of said slides, links pivotally connected at one end to the other set of rocker members and pivotally connected at the other end to the eccentric straps at points offset from the center of the respective eccentrics, the said points moving in an elliptical path during operation of the eccentrics, said links being of such length' that during the movement of said points about a. substantial portion of its elliptical path they will pivot about their points of connection with the rocker members, whereby an extended period of dwell will be obtained in the slide.

2. In a press, a plurality of slides, a plurality ofv eccentrics, eccentric straps individual to the eccentrics, two sets of rocker members, said eccentric straps directly connected to one set of said rocker members, means forming connections between one of said sets of rocker members and one of said slides, means forming connections between the other set of rocker members and another of said slides, links pivotally connected at one end to the other set of rocker members and pivotally connected at the other end to the eccentric straps at points oiset from the center of the respective eccentrics, the said points moving in an elliptical path during operation of the eccentrics, said links being of such lengths that during the movement of said points about a substantial portion of its elliptical path they will pivot about their points of connection with th'e rocker members, this portion of the `ellipitical path being substantially the same as the path of a radius of the link described from its point of connection with the rocker member, whereby an extended period of dwell will be obtained in the slide.

3. A press, embodying in its structure two slides, an eccentric, an eccentric strap, a rocker member, said eccentric strap connected to the rocker member, means forming a connection between said rocker member and one of the slides, a

end to the last said rocker member and pivotally y connected at its other end to the eccentric strap at a point oiset from the center of the eccentric, said point moving in an elliptical path during operation of the eccentric, said link being of rsuch length that during the movement of said point through a portion of its elliptical path it will pivot about its point of connection with the rocker member, whereby an extended'period of dwell will be obtained in the slide.

4. A press embodying in its structure two slides, an eccentric, an eccentric strap, a rocker member, said eccentric strap connected to the rocker member, means forming a connection between said rocker member and one of the slides, a second rocker member, means forming a connection between said second rocker member and the other slide, a link pivotally connected at one end to the last said rocker member and pivotally connected at its'other end to the eccentric strap at a point offset from the center of the eccentric, said point moving'in an elliptical path during operation of the' eccentric, said link being of such` length that during the movement of said point through a portion of its elliptical path it will pivot about vits point oi connection with the rocker member, this portion of the elliptical path being substantially the same as the radius of the link described from its point of connection with the rocker member, whereby an extended period of dwell will be obtained in the slide.

- RUDOLPH W. GLASNER. EINAR K. JOI-IANISEN. 

